I recently bought a previously owned Girard Perregaux. It is labeled "gyromatic" which I assume is their label for automatic. The watch runs well, keeps good time, but I cannot wind the mainspring. I can use the crown to set the time, but if I try to wind it I meet resistance. With great pressure I can advance the stem in the winding mode a little, but I do not think that is a normal resistance that should be encountered in winding. What is up with this watch? Is it not intended to be wound? It does keep very good time with automatic winding alone.